140957909 has 2 divisors, whose sum is σ = 140957910. Its totient is φ = 140957908.

The previous prime is 140957891. The next prime is 140957977. The reversal of 140957909 is 909759041.

140957909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140896900 + 61009 = 11870^2 + 247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140957909 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140957909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140953909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70478954 + 70478955.

It is an arithmetic number, because the mean of its divisors is an integer number (70478955).

Almost surely, 2^140957909 is an apocalyptic number.

It is an amenable number.

140957909 is a deficient number, since it is larger than the sum of its proper divisors (1).

140957909 is an equidigital number, since it uses as much as digits as its factorization.

140957909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 140957909 is about 11872.5696039232. The cubic root of 140957909 is about 520.4309900717.

The spelling of 140957909 in words is "one hundred forty million, nine hundred fifty-seven thousand, nine hundred nine".